Gasket



Julie 24, 1930. R. c. SCHEMMEL GASKET Filed Nov. 7, 1929 art undo; ffoberl" I C'. 5 chem/716K,

Patented June 24, 1930 UNITED STATES PATENT oFFicE.

nozsmr'c. scHEMmEL, or UNION any, INDIANA GASKET Application filed November 7, 1929. Serial No. 405,468.

My invention relates to improvements in or to provide the flange witha series of longaskets and/or Weatherstripping primarily gitudinal parallel rows of stitches. v ada ted to be interposed between a door Practice of either of the first two methods jam and a swinging door to. insulate the of the prior art involves an evident expense inside of the door from the outside and prewhich it is one object of my present invention 55 vent heat, transfer through the space between to eliminate. The third method ofthe prior the meeting edges of the door and 'jamb, art is meffectual to achieve the desired obwhether by conduction or convection. ject because of the fact that a line of stitch A principal object of my invention is to mg serves to stiffen the material through provide a gasket of the character indicat d which it passes only against bending stresses 6 which includes a soft yielding packing maapplied transversely of the line of stitching. terial of substantially cylindrical form en- When the gasket is applied and in use there I veloped within a covering fabric to maintain an be no such transverse stresses, since the the shape of the packing and prevent d t attaching tacks effectually hold the gasket rio 'ation of the same by the action of air, dOWIl throughout ltS entire length. The tenmoisture, etc. dency of the flange material to curl upwardly Another object of the invent-ion is to form along the free edge of the flange is therefore the fabric envelope with an outwardly pro- 7 left unimpaired by lines Of stitching parallel jecting side flange or lap adapted to receive i h h edge- 20 tacks or the like whereby thegasket may be In the prlor art also, whatever the means secured to the door jamb or the door without mp oyed to stlffen the flange, 1t has been penetration or mutilation of the packing manecessary to run a line of stitching through. terial. the flange plies close to the line where they More particularly, one of the principal obe ge to orm he p c i g enc osing por- 25 j ects is to provide an inexpensive and quickly tIOIrOf the fabr1c, for the purpose of tightly fabricated flange or lap which will be charretaining the packing in its cylindrical form. acterized by an unusual degree of stiffness It n Object f my present Invention to r b dy with t th c ity of f rmin provide the flange portions of gaskets of the the flange of any more than a minimum numharacter Indicated with a novel type of 30 h f li stitching which may be cheaply and quickly As heretofore commonly constructed the applled and which will at once serve'to stifi'en flange in question is integral with and an and reinforce the flange and maintain the elongation of the fabric envelope which enpacklng tightly 1n 1t s cylindrical form. cases the cylindrical packing. The packing In the accompanying drawmgs, which i1- 35 encasing portion of this fabric may be q it lustrate my present inventlon in several prethin and limp without sacrificing any of its F forms of en and whereon ffi i and consequently, if it were not f like reference characters mdicate the same the necessity of attaining a much greater deil m the ieveral gree of stiffness in the flange portion to prei 1S a gerspectwle shgwn vent curling and buckling and tearing out Sec i a one of a ementary from under the heads of attaching tacks, the gas et constructe accor mg to the prmclple fabric used in gaskets of the prior art might of my present mventlon; and

Fi s. 2 3 4 and 5 are similar views of be relatively light and cheap. However, to moded of gasket also embodying my 45 attain the necessary stiffness in the flange it present invention has b necessary, D to y Present In the drawings, 1 designates a soft-,fibrous ventlon, o use a heavy and therefore P packing of cotton or the like and preferably sive fabric; or to use an excess of the fabric ylindri al in form. A waterproof fabric in the flange, folding back a portion thereof material, as for example oilcloth, completely 50 on itself to form a three 01 four ply flange; envelopes the fabric, as shown at 2, to protect it from air and moisture, retain its shape, and, by being continued outwardly, as at 3, to form a flange or lap through which may be passed tacks or the like to secure the gasket in place against the door janib. It will be obvious that, apart from the tacks which fasten the flange in operative position, additional fastening means must be passed through the component .layers of the flange to hold them together. Furthermore, some fastening medium must pass through the flange layers close to the line where they diverge to encase the packing material, in order that the latter may be tightly confined against its tendency to be flattened out and spread in between the layers of the flange. And in addition, as pointed out hereinabove, the flange must be stiflened to provide an efficient gasket the flange of which will not buckle or curl and which will have sufficient body to prevent tearing past the heads of the attaching tacks.

I provide means for accomplishing all of these objects simply and inexpensively by disposing a zigzag or broken line of continuous stitching 4 from edge to edge across the flange, as shown in each of the figures. It will be clear that such stitching serves to reinforce the flange and prevent edge curling, because such curling would require the stitched material to lift in a direction substantially transverse to one or more of the short straight sections of the zigzag line of stitching. This type of stitching also serves to secure the component layers of the flange together. And since I prefer to bring the series of points 5, where the straight sections of the stitches change their direction along the inner edge of the flange, closely against the packing confining portion of the fabric, a separate line of stitching along this line to retain the packing tightly in its cylindrical form, is unnecessary. The opposite line of points 6 is disposed in close proximity to the outer edge of the flange to hold the plies tight-.

1y together along this outer edge.

In Figs. 2, 3, 4 and 5 I have shown various gaskets provided with various modified forms of flanges, to all of which my novel type of stitching 4 is applicable. Figs. 1 and 2 show a two-ply flange, a type which has heretofore met with but little favor in competition with the threeand fourply flanges shown in the other figures because it lacked the desirable stiffness and body explained above. When configured with my zigzag line of stitching 4, however, I have found the two-ply flange, which requires less fabric in its manufacture and is consequently much cheaper to make, is just as efficient as the threeand four-ply types. The latter, shown in Figs. 3, 4 and 5, may also be provided with the zigzag line of stitching 4 when the fabric used is unusually light and/or when an exceptionally stifl flange is desired.

The zigzag line of stitching may be produced on a standard sewing machine provided with the customary guide attachment for this purpose, as is well known and understood by those familiar with the art. It is to be noted also that the production of the zigzag line of stitching requires but a single passage of the gasket through the sewing machine, as compared with the plurality of passages necessary to effect the several lines of stitching required by gaskets of the prior art.

It is to be understood, furthermore, that while I have characterized the stitching 4 as a zigzag line, itis by no means essential to the spirit of my invention that this stitching be a true single, continuous broken line, though I have found that this type of stitching is most practicable and most easily and quickly applied. The essence of the invention consists in producing in the flange portion of the fabric a series of lines of stitching which are substantially transverse of the length of, the flange, and any form of such stitching is to be considered within the spirit of this invention in its broader aspects and therefore within the scope and purview of the appended claims.

Having thus described my invention, what I claim and wish to secure by Letters Patcut is:

1. A gasket comprising a packing, a fabric covering therefor extending from one side of the packing to form a multi-ply tacking flange, and stitches passing through the flange at substantially right angles to the longitudinal edge thereof.

2. A gasket comprising a packing, a fabric covering therefor extending from one side of the packing to form a multi-ply tacking flange, and a zigzag line of stitching passing through the plies of the flange.

3. A gasket comprising a packing, a fabric covering therefor extending from one side of the packing to form a multi-ply tacking flange, and a single line of stitching disposed in zigzag configuration across the flange, the inner points thereof lying along the extreme inner edge of the tacking flange to confine the packing in the fabric covering.

4. A gasket comprising a packing, a fabric covering therefor, portions of the covering extending outwardly from one side of the packing to form a multi-ply tacking flange, and a zigzag line of stitching passing through the plies of the flange, the outer points thereof being in close proximity to the outer edge of the flange.

5. A gasket comprising a packing, a fabric covering therefor, portions of the covering extending outwardly from one side of the packing to form a multi-ply tacking flange, and a zigzag line of stitching passing through the plies of the flange. the inner points thereof lying along the extreme inner edge of the tacking flange to confine the packing in the fabric covenng, and the outer points thereoi bein in close proximity to the outer edge of the ange to hold the plies tightly together along the outer edge of the flange.

In testimony whereof I afiix my signature.

ROBERT C. SCHEMMEL. 

